While age might just be a number, it does show up on your skin in the way of pesky fine lines and wrinkles. Even though the process of visible ageing of your skin starts as soon as you hit the age of 20, you can delay the process by using skincare products that include three types of acids—glycolic, lactic and hyaluronic. An acid sounds harsh, but it’s one of the best ways to fight ageing before it even begins. We’ve broken down the differences of the three and how they can benefit your skin at every stage of your life.

Glycolic acidGlycolic acid is an alpha hydroxy acid (AHA) which is a naturally occurring substance. It’s derived from sugarcane and is the strongest AHA, therefore it gives the fastest results. It works by exfoliating the skin and is best suited for someone looking to zap the signs of ageing and brighten their skin as fast as possible. If you have mature skin and already see fine lines or sun damage in forms of pigmentation, then glycolic acid is a definite ingredient you should be looking out for. Try: The Ordinary’s Glycolic Acid 7% Toning Solution

Lactic acidLactic Acid is also an AHA but is derived from sour milk. It’s milder than glycolic acid and works by exfoliating and smoothing the surface of your skin, while filling in tiny, fine lines. It’s ideal for someone in their 20s or 30s who wants to prevent ageing. Lactic acid is less irritating than glycolic, therefore it works better for someone with sensitive skin. Try: Sunday Riley’s Good Genes for an all-in-one treatment that can be used nightly.

Hyaluronic acidHyaluronic acid is also a naturally occurring substance found in skin, which attracts and holds moisture. As we start ageing, our skin slowly stops retaining moisture, resulting in dry skin. By using hyaluronic acid, you replenish that lost water, creating supple skin again. Try: L’Occitane Pivoine Sublime Skin Perfector.

For best results, choose between glycolic acid and lactic acid, depending on your skin type and needs, and pair it with hyaluronic acid. Before bed, apply the glycolic or lactic acid followed by hyaluronic acid. Remember to always use extra sun protection with any exfoliating product to avoid skin damage.

Haven’t been able to pick a concealer that matches your skin tone? Has your face been breaking out even when you don’t overload your skin with different products? We’re going back to basics with ‘Beauty 101’, our new series of stories that’ll be your complete guide to everything beauty. Make sure you don’t miss a single story, there will be a new one every day.